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Finding the Fourth Proportional to 425,728.80, 637,718.40 and 292,759.20

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Solution

The fourth proportional to 425,728.80, 637,718.40 and 292,759.20 is: 438,537.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,728.80 : 637,718.40 = 292,759.20 : x
  2. Step 2: Convert to fraction form
    425,728.80/637,718.40 = 292,759.20/x
  3. Step 3: Cross multiply
    425,728.80x = 637,718.40 × 292,759.20
  4. Step 4: Simplify right side
    425,728.80x = 186,697,928,609.28
  5. Step 5: Solve for x
    x = 186,697,928,609.28/425,728.80
  6. Step 6: Final answer
    x = 438,537.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.